![]() (Caret), match expression at the start of a line. Optionally make it case insensitive with the -i as listed above. The grep command, which stands for global regular expression print, is one of the most versatile commands in a Linux terminal environment. Exclude multiple words with grep by adding -E and use a pipe () to define the specific words. ![]() What is V bash -v Print shell input lines as they are read. grep comes with a lot of options which allow us to perform various search-related actions on files. It is a command line tool used in UNIX and Linux systems to search a specified pattern in a file or group of files. Its name comes from the ed command g/re/p (globally search for a regular expression and print matching lines), which has the same effect. To exclude particular words or lines, use the invert-match option. grep stands for Globally Search For Regular Expression and Print out. With the option -w, grep ensures that the matches are exactly the same pattern as specified. Here is a quick summary of the special characters used in the grep tool and their meaning: Text version. What GREP means grep is a command-line utility for searching plain-text data sets for lines that match a regular expression. This means that grep yo grep.txt will print the same results as grep yo grep.txt because yo can be found in you. The name comes from a command in the Unix text editor ed that takes the form g/re/p meaning search globally for a regular expression and print lines where instances are found. By default, grep matches strings which contain the specified pattern.
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